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Low field magnetic stimulation

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https://www.readbyqxmd.com/read/28580930/cascaded-spintronic-logic-with-low-dimensional-carbon
#1
Joseph S Friedman, Anuj Girdhar, Ryan M Gelfand, Gokhan Memik, Hooman Mohseni, Allen Taflove, Bruce W Wessels, Jean-Pierre Leburton, Alan V Sahakian
Remarkable breakthroughs have established the functionality of graphene and carbon nanotube transistors as replacements to silicon in conventional computing structures, and numerous spintronic logic gates have been presented. However, an efficient cascaded logic structure that exploits electron spin has not yet been demonstrated. In this work, we introduce and analyse a cascaded spintronic computing system composed solely of low-dimensional carbon materials. We propose a spintronic switch based on the recent discovery of negative magnetoresistance in graphene nanoribbons, and demonstrate its feasibility through tight-binding calculations of the band structure...
June 5, 2017: Nature Communications
https://www.readbyqxmd.com/read/28497056/direction-dependent-effects-of-combined-static-and-elf-magnetic-fields-on-cell-proliferation-and-superoxide-radical-production
#2
Jonne Naarala, Kavindra Kumar Kesari, Ian McClure, Cristina Chavarriaga, Jukka Juutilainen, Carlos F Martino
Proliferation of human umbilical vein endothelial cells was stimulated by a nearly vertical 60 or 120 μT static magnetic field (MF) in comparison to cells that were shielded against MFs. When the static field was combined with an extremely low frequency (ELF) MF (18 Hz, 30 μT), proliferation was suppressed by a horizontal but not by a vertical ELF field. As these results suggested that the effects of an ELF MF depend on its direction in relation to the static MF, independent experiments were carried out to confirm such dependence using 50 Hz MFs and a different experimental model...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28493223/-physiotherapy-occupational-therapy-and-physical-therapy-in-fibromyalgia-syndrome-updated-guidelines-2017-and-overview-of-systematic-review-articles
#3
A Winkelmann, H Bork, W Brückle, C Dexl, P Heldmann, P Henningsen, L Krumbein, V Pullwitt, M Schiltenwolf, W Häuser
BACKGROUND: The regular update of the guidelines on fibromyalgia syndrome, AWMF number 145/004, was scheduled for April 2017. METHODS: The guidelines were developed by 13 scientific societies and 2 patient self-help organizations coordinated by the German Pain Society. Working groups (n =8) with a total of 42 members were formed balanced with respect to gender, medical expertise, position in the medical or scientific hierarchy and potential conflicts of interest...
May 10, 2017: Der Schmerz
https://www.readbyqxmd.com/read/28463090/effects-of-transcranial-magnetic-stimulation-on-oxidative-stress-in-experimental-autoimmune-encephalomyelitis
#4
Francisco J Medina-Fernandez, Begoña M Escribano, Eduardo Agüera, Macarena Aguilar-Luque, Montserrat Feijoo, Evelio Luque, Fe I Garcia-Maceira, Alvaro Pascual-Leone, René Drucker-Colin, Isaac Tunez
Experimental autoimmune encephalomyelitis (EAE) reproduces a multiple sclerosis (MS)-like experimental model. The main objective was to evaluate the effect of extremely low-frequency electromagnetic fields (EL-EMF) application, like a paradigm of transcranial magnetic stimulation (TMS) in the development of EAE. Rats were injected with a single dose of 150 μg of myelin oligodendrocyte glycoprotein (MOG, fragment 35-55) to produce experimental MS. To assess the effect of TMS application in EAE, the rats were treated with TMS (60 Hz and 0...
May 19, 2017: Free Radical Research
https://www.readbyqxmd.com/read/28441282/magnetic-field-reference-levels-for-arbitrary-periodic-waveforms-for-prevention-of-peripheral-nerve-stimulation
#5
Gregory B Gajda, Stephen H Bly
Guidelines for prevention of peripheral nerve stimulation from exposure to low frequency magnetic fields have been developed by standard-setting bodies. Exposure limits or reference levels (RLs) are typically set in terms of the maximum root-mean-square amplitude of a sinusoidal waveform; however, environmental flux densities are often periodic, non-sinusoidal waveforms. This work presents a procedure for deriving RLs for any generalized periodic waveform using the empirical nerve-stimulation threshold data obtained from human volunteer MRI experiments...
June 2017: Health Physics
https://www.readbyqxmd.com/read/28430533/new-directions-in-the-rational-design-of-electrical-and-magnetic-seizure-therapies-individualized-low-amplitude-seizure-therapy-ilast-and-magnetic-seizure-therapy-mst
#6
Thomas Radman, Sarah H Lisanby
Electroconvulsive therapy remains a key treatment option for severe cases of depression, but undesirable side-effects continue to limit its use. Innovations in the design of novel seizure therapies seek to improve its risk benefit ratio through enhanced control of the focality of stimulation. The design of seizure therapies with increased spatial precision is motivated by avoiding stimulation of deep brain structures implicated in memory retention, including the hippocampus. The development of two innovations in seizure therapy-individualized low-amplitude seizure therapy (iLAST) and magnetic seizure therapy (MST), are detailed...
April 21, 2017: International Review of Psychiatry
https://www.readbyqxmd.com/read/28410876/the-treatment-of-fatigue-by-non-invasive-brain-stimulation
#7
REVIEW
Jean-Pascal Lefaucheur, Moussa A Chalah, Alaa Mhalla, Ulrich Palm, Samar S Ayache, Veit Mylius
The use of non-invasive brain neurostimulation (NIBS) techniques to treat neurological or psychiatric diseases is currently under development. Fatigue is a commonly observed symptom in the field of potentially treatable pathologies by NIBS, yet very little data has been published regarding its treatment. We conducted a review of the literature until the end of February 2017 to analyze all the studies that reported a clinical assessment of the effects of NIBS techniques on fatigue. We have limited our analysis to repetitive transcranial magnetic stimulation (rTMS) and transcranial direct current stimulation (tDCS)...
April 11, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28324930/rtms-enhanced-gamma-oscillation-through-strengthened-network-connection
#8
Mengmeng Dou, Xin Tian
Gamma oscillations emerge generally in working memory to aspect of higher cognitive functions, and typically with the interaction of brain network. How is gamma oscillatory activity influenced by the functional connection in the brain'a network? How can gamma oscillations be increased by neural modulation to result in potential benefits for working memory? The present study aims to investigate the intensity of gamma oscillations modulated by low frequency repetitive transcranial magnetic stimulation (rTMS), and the possible brain network mechanism of increased gamma oscillations during working memory task in rats...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28321048/evaluation-of-the-effects-of-power-frequency-magnetic-fields-on-the-electrical-activity-of-cardiomyocytes-differentiated-from-human-induced-pluripotent-stem-cells
#9
Masayuki Takahashi, Atsushi Saito, Yasuhiko Jimbo, Satoshi Nakasono
Although cardiac activity is known to differ between species in many respects, most evaluations of the cardiac effects of low-frequency electric and magnetic fields, which have a stimulant effect on electrically activated cells, have been performed in non-human experimental animals and cells, and the effects in humans have been assessed using theoretical models. In recent years, it has been verified that human cardiomyocytes differentiated from human induced pluripotent stem cells (hiPS-CM) are useful for evaluating human responses to various cardioactive compounds...
2017: Journal of Toxicological Sciences
https://www.readbyqxmd.com/read/28287977/neurostimulation-strategy-for-stress-urinary-incontinence
#10
Xuechen Huang, Kaihui Zheng, Sam Kohan, Petcharat May Denprasert, Limin Liao, Gerald E Loeb
We have developed a percutaneously implantable and wireless microstimulator (NuStim®) to exercise the pelvic floor muscles for treatment of stress urinary incontinence. It produces a wide range of charge-regulated electrical stimulation pulses and trains of pulses using a simple electronic circuit that receives power and timing information from an externally generated RF magnetic field. The complete system was validated in vitro and in vivo in preclinical studies demonstrating that the NuStim can be successfully implanted into an effective, low threshold location and the implant can be operated chronically to produce effective and well-tolerated contractions of skeletal muscle...
March 7, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28269207/effects-of-extremely-low-frequency-electromagnetic-fields-on-in-vitro-cellular-cultures-hela-and-cho
#11
A F Restrepo, V E Tobar, R J Camargo, E Franco, C R Pinedo, O Gutierrez
This paper presents the cellular proliferation effects of the exposure to extremely low frequency electromagnetic fields (ELF-EMF) on in-vitro cellular cultures HeLa and CHO. Through the magnetic stimulation system (MSS) the cells were exposed to magnetic fields with sinusoidal waveform at 50 Hz; initially for 40 minutes at intensities of 0.4 mT, 1.4 mT, 2.13 mT, 2.49 mT and 2.53 mT in parallel and perpendicular directions to the culture plates. Subsequently, the repetitive electromagnetic field (rEMF) was applied to 2...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28267751/cost-effectiveness-of-adjunct-non-pharmacological-interventions-for-osteoarthritis-of-the-knee
#12
Beth Woods, Andrea Manca, Helen Weatherly, Pedro Saramago, Eleftherios Sideris, Christina Giannopoulou, Stephen Rice, Mark Corbett, Andrew Vickers, Matthew Bowes, Hugh MacPherson, Mark Sculpher
BACKGROUND: There is limited information on the costs and benefits of alternative adjunct non-pharmacological treatments for knee osteoarthritis and little guidance on which should be prioritised for commissioning within the NHS. This study estimates the costs and benefits of acupuncture, braces, heat treatment, insoles, interferential therapy, laser/light therapy, manual therapy, neuromuscular electrical stimulation, pulsed electrical stimulation, pulsed electromagnetic fields, static magnets and transcutaneous electrical nerve Stimulation (TENS), based on all relevant data, to facilitate a more complete assessment of value...
2017: PloS One
https://www.readbyqxmd.com/read/28227437/effects-of-extremely-low-frequency-electromagnetic-fields-on-in-vitro-cellular-cultures-hela-and-cho
#13
A F Restrepo, V E Tobar, R J Camargo, E Franco, C R Pinedo, O Gutierrez, A F Restrepo, V E Tobar, R J Camargo, E Franco, C R Pinedo, O Gutierrez, C R Pinedo, E Franco, R J Camargo, V E Tobar, O Gutierrez, A F Restrepo
This paper presents the cellular proliferation effects of the exposure to extremely low frequency electromagnetic fields (ELF-EMF) on in-vitro cellular cultures HeLa and CHO. Through the magnetic stimulation system (MSS) the cells were exposed to magnetic fields with sinusoidal waveform at 50 Hz; initially for 40 minutes at intensities of 0.4 mT, 1.4 mT, 2.13 mT, 2.49 mT and 2.53 mT in parallel and perpendicular directions to the culture plates. Subsequently, the repetitive electromagnetic field (rEMF) was applied to 2...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28210202/mechanisms-and-effects-of-transcranial-direct-current-stimulation
#14
James Giordano, Marom Bikson, Emily S Kappenman, Vincent P Clark, H Branch Coslett, Michael R Hamblin, Roy Hamilton, Ryan Jankord, Walter J Kozumbo, R Andrew McKinley, Michael A Nitsche, J Patrick Reilly, Jessica Richardson, Rachel Wurzman, Edward Calabrese
The US Air Force Office of Scientific Research convened a meeting of researchers in the fields of neuroscience, psychology, engineering, and medicine to discuss most pressing issues facing ongoing research in the field of transcranial direct current stimulation (tDCS) and related techniques. In this study, we present opinions prepared by participants of the meeting, focusing on the most promising areas of research, immediate and future goals for the field, and the potential for hormesis theory to inform tDCS research...
January 2017: Dose-response: a Publication of International Hormesis Society
https://www.readbyqxmd.com/read/28131890/a-new-generation-of-magnetoencephalography-room-temperature-measurements-using-optically-pumped-magnetometers
#15
Elena Boto, Sofie S Meyer, Vishal Shah, Orang Alem, Svenja Knappe, Peter Kruger, T Mark Fromhold, Mark Lim, Paul M Glover, Peter G Morris, Richard Bowtell, Gareth R Barnes, Matthew J Brookes
Advances in the field of quantum sensing mean that magnetic field sensors, operating at room temperature, are now able to achieve sensitivity similar to that of cryogenically cooled devices (SQUIDs). This means that room temperature magnetoencephalography (MEG), with a greatly increased flexibility of sensor placement can now be considered. Further, these new sensors can be placed directly on the scalp surface giving, theoretically, a large increase in the magnitude of the measured signal. Here, we present recordings made using a single optically-pumped magnetometer (OPM) in combination with a 3D-printed head-cast designed to accurately locate and orient the sensor relative to brain anatomy...
January 25, 2017: NeuroImage
https://www.readbyqxmd.com/read/28116447/localized-n20-component-of-somatosensory-evoked-magnetic-fields-in-frontoparietal-brain-tumor-patients-using-noise-normalized-approaches
#16
Nor Safira Elaina, Aamir Saeed Malik, Wafaa Khazaal Shams, Nasreen Badruddin, Jafri Malin Abdullah, Mohammad Faruque Reza
PURPOSE: To localize sensorimotor cortical activation in 10 patients with frontoparietal tumors using quantitative magnetoencephalography (MEG) with noise-normalized approaches. MATERIAL AND METHODS: Somatosensory evoked magnetic fields (SEFs) were elicited in 10 patients with somatosensory tumors and in 10 control participants using electrical stimulation of the median nerve via the right and left wrists. We localized the N20m component of the SEFs using dynamic statistical parametric mapping (dSPM) and standardized low-resolution brain electromagnetic tomography (sLORETA) combined with 3D magnetic resonance imaging (MRI)...
January 23, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28068296/orientation-selective-deep-brain-stimulation
#17
Lauri J Lehto, Julia P Slopsema, Matthew D Johnson, Artem Shatillo, Benjamin A Teplitzky, Lynn Utecht, Gregor Adriany, Silvia Mangia, Alejandra Sierra, Walter C Low, Olli Gröhn, Shalom Michaeli
OBJECTIVE: Target selectivity of deep brain stimulation (DBS) therapy is critical, as the precise locus and pattern of the stimulation dictates the degree to which desired treatment responses are achieved and adverse side effects are avoided. There is a clear clinical need to improve DBS technology beyond currently available stimulation steering and shaping approaches. We introduce orientation selective neural stimulation as a concept to increase the specificity of target selection in DBS...
February 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28034451/predictors-of-response-to-repetitive-transcranial-magnetic-stimulation-rtms-in-the-treatment-of-major-depressive-disorder
#18
G Beuzon, Q Timour, M Saoud
Repetitive transcranial magnetic stimulation (rTMS), based on the principle of electromagnetic induction, consists of applying series of magnetic impulses to the cerebral cortex so as to modulate neurone activity in a target zone. This technique, still experimental, could prove promising in the field of psychiatry, in particular for the treatment of major depressive disorder. It is important for the clinician to be able to assess the response potential of a given patient to rTMS, and this among other things requires relevant predictive factors to be available...
December 26, 2016: L'Encéphale
https://www.readbyqxmd.com/read/28013233/the-influence-of-alertness-on-the-spatial-deployment-of-visual-attention-is-mediated-by-the-excitability-of-the-posterior-parietal-cortices
#19
Rebecca E Paladini, René M Müri, Jurka Meichtry, Tobias Nef, Fred W Mast, Urs P Mosimann, Thomas Nyffeler, Dario Cazzoli
With a reduced level of alertness, healthy individuals typically show a rightward shift when deploying visual attention in space. The impact of alertness on the neural networks governing visuospatial attention is, however, poorly understood. By using a transcranial magnetic stimulation twin-coil approach, the present study aimed at investigating the effects of an alertness manipulation on the excitability of the left and the right posterior parietal cortices (PPCs), crucial nodes of the visuospatial attentional network...
January 1, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28011252/construction-and-modeling-of-a-reconfigurable-mri-coil-for-lowering-sar-in-patients-with-deep-brain-stimulation-implants
#20
Laleh Golestanirad, Maria Ida Iacono, Boris Keil, Leonardo M Angelone, Giorgio Bonmassar, Michael D Fox, Todd Herrington, Elfar Adalsteinsson, Cristen LaPierre, Azma Mareyam, Lawrence L Wald
Post-operative MRI of patients with deep brain simulation (DBS) implants is useful to assess complications and diagnose comorbidities, however more than one third of medical centers do not perform MRIs on this patient population due to stringent safety restrictions and liability risks. A new system of reconfigurable magnetic resonance imaging head coil composed of a rotatable linearly-polarized birdcage transmitter and a close-fitting 32-channel receive array is presented for low-SAR imaging of patients with DBS implants...
February 15, 2017: NeuroImage
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